Spin-resolved photoemission study of epitaxially grown MoSe 2 and WSe 2 thin films

Mo, Sung-Kwan; Hwang, Choongyu; Zhang, Yi; Fanciulli, Mauro; Muff, Stefan; Hugo Dil, J.; Shen, Zhi-Xun; Hussain, Zahid

doi:10.1088/0953-8984/28/45/454001

Title: Spin-resolved photoemission study of epitaxially grown MoSe ₂ and WSe ₂ thin films

Journal Article · Mon Sep 12 00:00:00 EDT 2016 · Journal of Physics. Condensed Matter

DOI:https://doi.org/10.1088/0953-8984/28/45/454001· OSTI ID:1349089

Mo, Sung-Kwan ^[1]; Hwang, Choongyu ^[2]; Zhang, Yi ^[3]; Fanciulli, Mauro ^[4]; Muff, Stefan ^[4]; Hugo Dil, J. ^[4]; Shen, Zhi-Xun ^[5]; Hussain, Zahid ^[1]

Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source
Pusan National Univ., Busan (Korea, Republic of). Dept. of Physics
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source; Nanjing Univ. (China). National Lab. of Solid State Microstructures; SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Inst. of Materials and Energy Sciences
Ecole Polytechnique Federale Lausanne (Switzlerland). Inst. of Physics; Paul Scherrer Inst. (PSI), Villigen (Switzerland). Swiss Light Source
SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Inst. of Materials and Energy Sciences; Stanford Univ., CA (United States). Geballe Lab. for Advaned Materials

© 2016 IOP Publishing Ltd. Few-layer thick MoSe 2 and WSe 2 possess non-trivial spin textures with sizable spin splitting due to the inversion symmetry breaking embedded in the crystal structure and strong spin-orbit coupling. We report a spin-resolved photoemission study of MoSe 2 and WSe 2 thin film samples epitaxially grown on a bilayer graphene substrate. We only found spin polarization in the single-and trilayer samples-not in the bilayer sample-mostly along the out-of-plane direction of the sample surface. The measured spin polarization is found to be strongly dependent on the light polarization as well as the measurement geometry, which reveals intricate coupling between the spin and orbital degrees of freedom in this class of material.

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Research Organization:: SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC02-05CH11231; AC02-76SF00515; 2015R1C1A1A01053065; PP00P2 144742/1

OSTI ID:: 1349089

Alternate ID(s):: OSTI ID: 1323987; OSTI ID: 1379583

Journal Information:: Journal of Physics. Condensed Matter, Vol. 28, Issue 45; ISSN 0953-8984

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 27 works

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36 MATERIALS SCIENCE
transition metal dichalcogenides
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spin-resolved photoemission
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Title: Spin-resolved photoemission study of epitaxially grown MoSe 2 and WSe 2 thin films

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Title: Spin-resolved photoemission study of epitaxially grown MoSe ₂ and WSe ₂ thin films